On Wed, 30 Mar 2005 07:32:36 +1000
Daniel Carosone <dan@geek.com.au> wrote:

> The problem is that the buffer cache then contains two copies of the
> data - once for the vnd file, and once for the file in the filesystem
> mounted off the vnd device.

I think I may be ok then as the data I have is different (1 compressed,
and 1 uncompressed), and also of different size. It is important that
both of these be in cache, as the compressed data cache can be used
to support a not yet decompressed block.